approval notification keeps previous input

We use workflow approvals.   We request information or answer a request for information and proceed to the next approval.  If we want to request information on the NEXT purchase order the drop down box provides the people from the PREVIOUS PO, not the current one.  The same with the information box - if you fill in the information and submit it and go to the next one to submit information on it the screen has RETAINED the previous information.  In other words they aren't refreshing with the new information.  I got out of notifications and went back in and it